A rabbi who barricaded the doors of a synagogue while it was under a 'marauding terror attack' by a knifeman has today been hailed a hero.

Rabbi Daniel Walker leapt into action after the Heaton Park Hebrew Congregation Synagogue came under attack shortly after 9.30am.

The suspect, who was later shot by armed police and has since died, first rammed a car into the worship site before going on a rampage, killing least two people. Three others remain in a serious condition, authorities have said.

As the carnage outside unfolded, Rabbi Walker - who has headed Heaton Park since 2008 - blocked the entrance of the 'packed' building, protecting those inside.

Dramatic pictures of the scene later showed the attacker, who police claimed had been 'armed with a bomb', attempting to smash his way into the synagogue before being gunned down.